ox·al·is /ɑkˈsæləs/
  醋漿草
  Ox·a·lis n.  Bot. A genus of plants, mostly herbs, with acid-tasting trifoliolate or multifoliolate leaves; -- called also wood sorrel.
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  oxalis
       n : any plant or flower of the genus Oxalis [syn: sorrel, wood
           sorrel]